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Finding the Fourth Proportional to 1,608.94, 2,391.71 and 1,561.64

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Solution

The fourth proportional to 1,608.94, 2,391.71 and 1,561.64 is: 2,321.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,608.94 : 2,391.71 = 1,561.64 : x
  2. Step 2: Convert to fraction form
    1,608.94/2,391.71 = 1,561.64/x
  3. Step 3: Cross multiply
    1,608.94x = 2,391.71 × 1,561.64
  4. Step 4: Simplify right side
    1,608.94x = 3,734,992.54
  5. Step 5: Solve for x
    x = 3,734,992.54/1,608.94
  6. Step 6: Final answer
    x = 2,321.40

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.